Papers by Md Masuduzzaman
IEEE, 2023
On the surface of Mars, autonomous rover navigation can considerably enhance everyday travel, esp... more On the surface of Mars, autonomous rover navigation can considerably enhance everyday travel, especially when venturing into uncharted territory distant from the lander. Making a prototype for an effective and autonomous rover is the goal of this endeavor. The implementation of multiple perceptual blending together with the dissemination of the visuals, synthetic Mars environment, and atmospheric components. In this study, a Mars rover design was built that has a sensor array on the main body and a transportable structure for picking up soil samples and storing them for onboard testing. In addition, manual control is carried out with the aid of video that is broadcast from the rover to the base station, along with sensor arrays that include temperature, PH, and humidity sensors. Artificial intelligence is also addressed, along with speech recognition technology and realtime position sharing from the rover to the base station utilizing GPS. An overview of the development reveals that it is readily capable of carrying out all the required general activities. The rover is also able to traverse all of the aforementioned terrains, lift a substantial amount of mass without failing, and successfully recognize voices, enabling a far longer daily trip than is possible with purely ground-planned methods.
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Langmuir, 2022
In a nanofluidic system, the electroosmotic flow (EOF) is a complex fluid transport mechanism, wh... more In a nanofluidic system, the electroosmotic flow (EOF) is a complex fluid transport mechanism, where the formation of an electrical double layer (EDL) occurs ubiquitously at the dissimilar atomic interface. Several studies have suggested various interface boundaries to calculate the EDL thickness. However, the physical origin of the interface boundary and its effects on the flow properties is not yet clearly understood. Combining the theoretical framework and molecular dynamics (MD) simulations, we show the effects of different interfacial boundaries on the EDL thickness and EOF characteristics. Implemented interface boundaries exhibit the EDL thickness–boundary relation, i.e., the EDL thickness from MD simulations shows the tendency of converging toward the continuum approximation. Furthermore, inserting these values of EDL thicknesses into the continuum equation shows the convergence of flow transition of the molecular state to a neutral from an electrical violation phase, which takes a parabolic to plug-like shape in the velocity profile. Different interface boundaries also affect the hydrodynamic properties (viscosity and electroviscosity) of EOF, which varies from the bulk to interface region, as well as the fluid flow. Therefore, we can infer that, at the molecular level, the dissimilar atomic boundary and hydrodynamic properties dominate the electrokinetic flow. Our simulation results and theoretical model provide fundamental insightful information and guidelines for the EOF study based on the atomic interface and dynamic structure-based hydrodynamic property.
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Microfuidics and Nanofuidics , 2021
Measurements of contact angles are conventionally used to describe the wetting behavior of nanosc... more Measurements of contact angles are conventionally used to describe the wetting behavior of nanoscopic liquid droplets on a flat substrate, where the dissimilar molecular interface is vague. Considering this issue, we performed an atomistic simulation of the spherical nano-droplets of pure and ion-water on a bare solid substrate to determine the relationship between the contact angle and the boundary position residing at the solid–liquid interface. In this exploration, the existence of the correlation between the contact angle and the associated boundaries is observed using classical Young’s equation. Our study reveals that the effects of the variable wettability and boundary positions have a significant impact on the contact angle. In addition, we investigate the contact angle based on boundary positions for different ion-water nano-droplets with varying ion concentrations. Interestingly, the contact angles of pure and ion-water droplets are almost identical in a specific boundary position for both varying wettability and ion concentrations. Finally, we compare the estimated contact angle for different boundary positions with the solid substrate experimental contact angle. Atomistic simulations indicate that the interfacial boundary concept for measuring contact angle using classical Young’s equation gives a certain convergence to experimental evaluation.
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ACS Omega, 2020
The dependence of the heat transfer of a nanoscopic liquid channel residing at the solid−liquid i... more The dependence of the heat transfer of a nanoscopic liquid channel residing at the solid−liquid interface is traditionally ascribed to the temperature jump, interfacial thermal resistance, wettability, and heat flux. Other contributions stemming from the channel width dependence such as the boundary position are typically ignored. Here, we conducted nonequilibrium molecular dynamics simulations to better understand the relation between channel width and boundary positions located at the solid−liquid interface. The system under investigation is a simple liquid confined between the solid from nanochannels of different sizes (3.27−7.35 nm). In this investigation, the existence of the correlation between the boundary position and the channel width is observed, which follows an exponential function. The thermal conductivity of the boundary positions is compared with the experimental value and Green−Kubo prediction to verify the actual boundary position. Atomistic simulation reveals that the solid−liquid boundary position, which matches the experimental value of thermal conductivity, varies with the channel width because of the intermolecular force and the phonon mismatch of the solid and the liquid.
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IEEE, 2018
Electronic waste or e-waste defines rejected electrical or electronic devices. Secondhand electro... more Electronic waste or e-waste defines rejected electrical or electronic devices. Secondhand electronics which are destined for recover, resale, salvage, recycling, or disposal are also considered e-waste. Electronic waste is an emerging concern posing serious contamination problems to the human and the environment. E-waste disposal is a typical task for whole over the world. Utilization of E-waste materials is a partial solution to environmental and ecological problems. Due to large amount of concrete use as the construction material availability of raw material is being questioned. Therefore, other replacing materials are needed to be finding out. E-waste is used as one such alternative for aggregate in concrete. This paper presents a summary on probable use of E-waste in concrete on the basis of different researchers and it marches strong possibility of E-waste being used as additional of aggregate as well as environmental impact. The use of natural aggregates in concrete will be decreased if different types of by-product is used in concrete as a substitute material. And it is more important to renovate the waste material.
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Mild Steel, copper, aluminum, zinc are the major usable materials used in the industries and dome... more Mild Steel, copper, aluminum, zinc are the major usable materials used in the industries and domestic purposes. In every year huge amount of investment is made in industries and in buildings, whereas cost due to corrosion is measured in large scale worldwide. So, the measurement of corrosion of different materials in different environment should be estimated. Metals corrode in any contaminated environment as acid medium, sea water, and fresh water even in atmosphere. The experimental study under this project on corrosion behavior and mechanism in weight loss method for some materials in different medium have been studied in different medium, for instance, sodium chloride salt, sulfuric acid, nitric acid fresh water. Which were studied for a period of five days interval weighing and re-immersing. A comparison has also studied on the corrosion rates of different materials.
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In this study, activated carbon produced by chemical activation method from charcoal using severa... more In this study, activated carbon produced by chemical activation method from charcoal using several methods. Firstly, woods were pyrolyzed at about 450 during 1 hour by the infrared cooker and kept for cooling. When cooled down, the carbonized product was taken into 50% NaCl, 25% and 50% calcium chloride solution. Then it rinsed with clean water and dried it at about 100 . And then experimented through 0.004% methyl orange solution by taking activated Charcoal and Carbonized product into it and kept inside 24 hours of adsorption. To know the adsorption, absorbance was known through UV Spectrophotometer of carbonized product and other activated carbon’s solution. And decided that in favor of 25% calcium chloride solution, carbon activated mostly.
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Papers by Md Masuduzzaman